From ReactOS

• Installed devices: "HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\VIDEO". values are:
  • "MaxObjectNumber": Value of type REG_DWORD, containing the max device number <maxdev>.
  • "\Device\Video0" .. "\Device\Video<maxdev>": Values of type REG_SZ, each containing the registry key for the device.
  • "\Device\Disc": ?
  • "VgaCompatible": value of type REG_SZ, containing the device name of the vga compatible device.

• Each device key:
  • "\Registry\Machine\System\CurrentControlSet\Control\Video\{19D0ECD0-F5D9-4A4B-8005-36253C8D799D}\0000"
  • "\REGISTRY\Machine\System\CurrentControlSet\Services\TSDDD\Device0" (for "\Device\Disc")
    • "Device Description", type is REG_SZ, human readable name ("NVIDIA GeForce 6150")
    • "InstalledDisplayDrivers": REG_MULTI_SZ, all display drivers used for this device.
    • "VgaCompatible": REG_DWORD, 0 or 1
    • "DefaultSettings.BitsPerPel", "DefaultSettings.XResolution", "DefaultSettings.YResolution", ...

Each of type REG_DWORD (Settings are not current settings!)

• Current settings key:
  • "HKLM\SYSTEM\ControlSet001\Hardware Profiles\0001\System\CurrentControlSet\Control\VIDEO\{19D0ECD0-F5D9-4A4B-8005-36253C8D799D}\0000"